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Summarize the following Wikipedia article: "The United Nations".
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The United Nations is an international organization that works to maintain peace and security, develop friendly relations among nations, and promote social progress and better standards of living for all people. It is composed of 193 member states who are committed to upholding the principles of the UN Charter and upholding international law. The organization also engages in humanitarian projects, such as delivering aid to conflict-affected areas or providing access to safe drinking water. Its main organs include the General Assembly, Security Council, and the International Court of Justice.